Hello fellow Fedorians,
Good news, once you've gdm-3.16.0.1-2.fc22 (currently in updates-testing) and xorg-x11-server-Xorg-1.17.1-7.fc22 installed then if you start the X server (Xorg) by logging into gdm, or from startx then it will run as user by default. It still gets started via a suid root wrapper, so if you're relying on vesa graphics, or using a binary driver, then it will still run as root.
Enjoy,
Hans
Good news, once you've gdm-3.16.0.1-2.fc22 (currently in updates-testing) and xorg-x11-server-Xorg-1.17.1-7.fc22 installed then if you start the X server (Xorg) by logging into gdm, or from startx then it will run as user by default. It still gets started via a suid root wrapper, so if you're relying on vesa graphics, or using a binary driver, then it will still run as root.
Enjoy,
Hans